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Information about the organization and its journal, The Aquatic Gardener. AGA's purpose is to disseminate information about aquatic/aquarium plants.
http://www.aquatic-gardeners.org/
Source of expertise in the field of biological, mechanical, and chemical aquatic plant management and aquatic plant species.
http://www.apms.org/
Dedicated to the advancement of planted aquariums.
http://www.aquatic-plants.org/